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Ashin3351銀蟲 (小有名氣)
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[求助]
求助翻譯成中文,謝謝
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In theory,instead, implementing chirality directly at the reactive metal center−exploiting the metal as a source of centrochirality− would be highly attractive since the close proximity of the metal to the coordinating substrate promises a highly effective transfer of chirality during the asymmetric induction.However, a considerable obstacle for the realization of such reactive chiral-at-metal asymmetric catalysts constitutes the retention of the relative and absolute metal-centered configuration during the reaction, since the coordination number at the metal varies during each catalytic cycle and thereby provides ample opportunities for the stereochemistry of the metal to scramble. |
版主 (文壇精英)
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相反,理論說來在活性金屬中心直接實現(xiàn)手性------利用該金屬作為中心手性源------ 將非常有吸引力,因為金屬與配位基的高度相似性保證了不對稱誘導過程中手性高效傳輸。然而,為要實現(xiàn)這種反應性的 金屬手性 不對稱催化,巨大的障礙在于, 反應過程中如何保留相對和絕對金屬中心的構型。因為每個催化循環(huán)過程中金屬的配位數(shù)是變化的,因而金屬立體構型多變(為金屬立體構型提供了充足的搶奪機會) 。 希望拋磚引玉! |

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